Three-phase electric motor: 3LC-355LX1B-4, 400 kW
| Basic technical data | |
| Motor type | 3LC-355LX1B-4 |
| Rated power (kW) | 400 |
| Frame size (mm) | 355 |
| Number of poles | 4 |
| Rated speed (rpm) | 1485 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 400/690 |
| Connection | △/Y |
| Rated current 400 V (A) | 661 |
| Rated current 690 V (A) | 383 |
| Efficiency at 100% load (%) | 96 |
| Efficiency class | IE3 |
| Power factor at 100% load | 0,91 |
| Starting and torque characteristics | |
| Locked-rotor torque ratio (LRT/RLT) | 1,4 |
| Breakdown torque ratio (BDT/RLT) | 2 |
| Locked-rotor current ratio (LRA/RLA) | 7 |
| Rotor moment of inertia (kg·m²) | – |
| Applicable standards | |
| Specification | IEC60034-1 |
| Testing | IEC60034-2 |
| Noise | IEC60034-9 |
| Vibration | IEC60034-14 |
| Construction and operating data | |
| Mounting arrangement | IM B3, B5, B35, V1 |
| Duty type | S1 (S2, S3, S4 – S9 optional) |
| Load type | Parabolic or linear curve |
| Degree of protection | IP55 |
| Insulation class | F |
| Temperature rise class | B |
| Cooling method | IC411 |
| Starting method | DOL, VFD, soft starter |
| Direction of rotation | Both |
| Vibration (mm/s) | 2.8 |
| Cable glands | 2-M63X1.5 |
| Operating conditions | |
| Ambient temperature range | -20 to +40°C (-30, +50, +60 optionally) |
| Maximum installation altitude | up to 1000m |
| Packaging and dimensions | |
| Packaging dimensions (mm) | – |
| Package weight (kg) | 2000 |
| Bearings and lubrication | |
| DE/NDE bearings | 6322-C3/6322-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
1500 rpm electric motor for continuous operation of production technologies
In large production lines, pumping technology and heavy technological assemblies, drive stability determines whether operation remains smooth or suffers unnecessary downtime. The 3LC-355LX1B-4 delivers savings through a well-considered design and value for operators who need a motor with reserve capacity for long duty cycles. This 1500 rpm electric motor is designed for applications where efficiency, service availability and long-term durability in industrial automation environments are monitored.
With a power output of 400 kW and a 400/690 V supply, the motor performs well in assemblies that require reliable starting and stable operation under steady load. A rated current of 661 A at △ 400V and 383 A at Y 690V gives designers a clear basis for power-supply and protection design. Industrial systems also benefit from the rated speed of 1485 rpm, which supports smooth power transmission without unnecessary fluctuations.
IE3 efficiency class in a 400 V electric motor saves operating costs
IE3 efficiency class supports lower losses under long-term loading, which is particularly noticeable in the energy balance of large factories. Super high efficiency is most evident wherever the motor runs in a steady state for most of the time and consumption is monitored across entire production units. Efficiency of 96% and a power factor of 0.91 provide a basis for sensible drive sizing even in demanding technological nodes.
For integrators and OEM manufacturers, it is also important that a 400 V electric motor in this design helps keep switchgear and cable-route design clear. A starting current ratio LRA/RLA of 7, together with a starting torque ratio of 1.4, supports use in applications where the drive must quickly transition from start-up into stable operation.
Robust cast-iron frame for vibration, load and long service intervals
A robust cast-iron frame is advantageous wherever the drive is exposed to vibration, impact loading or higher requirements for mounting rigidity. Reinforced cast-iron bearing shields and reinforced cast-iron feet help maintain assembly stiffness even under long-term mechanical stress. For operations with strict maintenance schedules, this means fewer unplanned interventions and better control over the equipment life cycle.
DE bearing 6322-C3 and NDE bearing 6322-C3 are selected to support reliable rotor mounting even under loads typical of large technological units. A noise level of 95 dB(A) is a parameter that must be considered particularly in machine rooms where the motor forms part of an enclosed technological area.
3LC PRO construction for OEM solutions and large factories
The 3LC PRO series is suitable for equipment manufacturers and operators who need a motor without compromises when integrating it into pumps, compressors, conveyors or mills. Cable glands 2-M63X1.5 simplify wiring in robust assemblies while allowing a professional connection. A packaged weight of 2000 kg reflects a construction designed for heavy industrial use and safe handling during installation.
Specific applications in heavy industrial operation
The 3LC-355LX1B-4 model is used in the following applications:
- Main process-water pump in a steelworks.
- Air-handling blower in a large dryer.
- Drive unit in a cement-production line.
- Compressor for central compressed-air distribution.
- Aggregate crusher in a mining facility.
- Agitator in a chemical reactor.
- Bulk-material conveyor in silo operations.
- Rolling line in a metallurgical facility.
- Industrial fan for dust filtration.
- Extruder in plastics processing.
- Mill for grinding raw materials in food production.
- Winch for heavy lifting equipment.
- Process pump in a paper mill.
Proven manufacturer and distributor VYBO Electric for reliable purchasing
For industrial deliveries, component origin also matters, which is why it is important that this is a solution from proven manufacturer and distributor VYBO Electric. Purchasing departments and technical teams can rely on real parameters, service continuity and use in industrial operations where nothing less than stable performance throughout the shift is expected.
If you need a motor for a new line, a replacement in existing technology or a robust basis for an OEM project, contact us.